Launch vehicle with interstage propellant manifolding
Patent 5141181 Issued on August 25, 1992. Estimated Expiration Date: 
October 5, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 5, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2755046 3369771 3782400 Liquid fuel multistage rocket Orientation system for a spin stabilized spacecraft Supplemental oil system for engines Pressure resistant member Three stage rocket vehicle with parallel staging Transfer vehicle for use in conjunction with a reusable space shuttle Heat management system for aircraft InventorApplicationNo. 417736 filed on 10/05/1989US Classes:244/2, COMPOSITE AIRCRAFTD12/320Space satellite or habitat (7)ExaminersPrimary: Barefoot, Galen L.Attorney, Agent or FirmForeign Patent References
International ClassB64G 001/40AbstractAn improved launch vehicle having a central vehicle stack with an upper stage, a lower stage and payload, and having one or more additional parallel burning stages burning in parallel with the lower stage. Interstage propellant transfer is provided from the shorter to longer burning parallel stages. The additional parallel stages are preferably of substantially the same, or greater, length as the central lower stage. The central lower stage and parallel additional stages may preferably have substantially the same thrust capabilities at liftoff and sufficient thrust to provide redundancy and hence increased reliability, in the event of loss of one of the parallel stages.Other References
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